The comfy belt he didn't know he needed. The magnetic buckle solves the phone-pulling-my-pants-down problem. Natural rubber stretch, not cheap elastic. TSA friendly. Magnets plus a locking system, so it never comes undone. I genuinely wear it.
The shirt he wouldn't buy himself. That's the whole pitch. He'd never spend it on himself, which is exactly why it's a gift.
The hoodie that actually handles serious weather. SolarCore aerogel insulation, thin and seriously warm. I haven't taken it off since the weather got cooler.